Description: Inference exchanging the last antecedent with the second. (Contributed by Thierry Arnoux, 3-Jun-2025)
| Ref | Expression | ||
|---|---|---|---|
| Hypothesis | an52ds.1 | ||
| Assertion | an52ds |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | an52ds.1 | ||
| 2 | an32 | ||
| 3 | 2 | anbi1i | |
| 4 | 1 | an42ds | |
| 5 | 3 4 | sylanbr | |
| 6 | 5 | an42ds |